Aqueous liquid detergent dispersions

ABSTRACT

Aqueous liquid detergent dispersions are claimed which essentially comprise  
     5% by weight to 35% by weight of anionic surfactant  
     10% by weight to 50% by weight of builders,  
     0% by weight to 10% by weight of electrolytes and  
     0.1% by weight to 10% by weight of quaternary alkylhydroxyethylammonium salt, where the % by weight ratio of anionic surfactant to quaternary alkylhydroxyethylammonium salt is 50:1 to 2:1.

[0001] Liquid detergents in disperse form based on water, comprisingsurfactants, quaternary alkyldimethylhydroxyethylammonium salt and/oralkylmethylbishydroxyethylammonium salt, one or more electrolytes andone or more builders.

[0002] By adding hydroxyethyl quats to an aqueous solution ofsurfactants, electrolytes and builders, a very stable dispersion withgood detergency and favorable viscosity behavior is obtained.

[0003] Compared with solid, pulverulent or particulate products, liquiddetergents have a number of applications-related advantages. They can bemeasured out easily, dissolve rapidly in the wash water and can beapplied in concentrated solutions or dispersions to soiled areas of thetextiles to be washed. Moreover, it is possible to incorporatesubstances which would decompose during drying operations and areunsuitable for solid compositions into liquid detergent formulations.

[0004] As a result of limited solubility, only restricted amounts ofsoluble ingredients, e.g. builders and surfactants, can be incorporatedinto clear liquid detergent formulations and, accordingly, higher doseshave to be used in the washing operation in order to ensure gooddetergency even at high water hardnesses and with corresponding partialdeactivation of the anionic surfactants.

[0005] In liquid detergent dispersions it is possible to use very muchlarger amounts of ingredients and thus a reduction in dosing per washoperation can be achieved. In addition, liquid detergent dispersionspermit the use of only sparingly water-soluble ingredients. Furthermore,liquid detergent dispersions generally have significantly higherviscosities than clear liquid detergent formulations.

[0006] On the other hand, liquid detergent dispersions have a tendencytoward phase separation during prolonged storage periods and in the caseof relatively large temperature fluctuations.

[0007] For example, some products experience separation upon storage,others upon cooling and cannot be readily dispersed again. In somecases, the viscosity of the product changes; it either becomes too thickand is no longer flowable or appears too watery thin.

[0008] The object was to prepare liquid-disperse detergent formulationswhich, as well as having a good detergency, do not exhibit phaseseparation over long periods of time and also in cases of largetemperature fluctuations, have favorable rheological behavior and can beprepared cost effectively.

[0009] EP 170 091 claims disperse liquid detergents based on water,comprising linear alkylbenzenesulfonate, potassium or sodiumtripolyphosphate and a solid builder. The formulations are notable forthe fact that, in the presence of the electrolyte, the solubility of thesurfactant in water is reduced and, as a consequence of the salting-outeffect, this is present in the aqueous phase in dispersed form.

[0010] Our own investigations show that surfactants with better watersolubility when compared with alkylbenzenesulfonate, for examplesec-alkanesulfonates, exhibit a low salting-out effect in the presenceof electrolytes and consequently cannot be formulated as dispersions inthe same way.

[0011] Surprisingly, it has been found that the addition of smallamounts of a quaternary alkylhydroxyethylammonium compound to an aqueousmixture comprising anionic surfactants, builders and optionallyelectrolytes can improve the phase stability and solubility of liquiddetergent dispersions.

[0012] As well as the improved storage stability, a better detergency ofthe liquid detergent dispersions according to the invention was foundfor particular soilings, in particular toward oil- or grease-containingstains.

[0013] The invention provides aqueous liquid detergent dispersions whichessentially comprise

[0014] 5 to 35% by weight, preferably 5 to 25% by weight, in particular5 to 20% by weight, of anionic surfactant 10 to 50% by weight,preferably 10 to 40% by weight, in particular 10 to 30% by weight, ofbuilders, 0 to 10% by weight, preferably 0 to 7% by weight, inparticular 0 to 4% by weight, of electrolytes and

[0015] 0.1 to 10% by weight of quaternary alkylhydroxyethylammoniumsalt, where the % by weight ratio of anionic surfactant to quaternaryalkylhydroxyethylammonium salt is 50:1 to 2:1, preferably 30:1 to 2:1,in particular 15:1 to 2:1.

[0016] The compositions according to the invention preferably comprisequaternary alkylhydroxyethylammonium salt according to the formula 1

[0017] where R¹ is a linear or branched, saturated or unsaturated alkylgroup having 5 to 22 carbon atoms, preferably 8 to 18 carbon atoms,particularly preferably 12 to 14 carbon atoms, R² is a methyl group, R³is a methyl group or a group of the formula -A-(OA)_(n)—OH, where A maybe a —C₂H₄— and/or —C₃H₆— group and n may be a number from 0 to 20, R⁴is a group of the formula -A-(OA)_(n)—OH and X is an anion, X is, forexample, chloride, bromide, iodide, fluoride, sulfate, hydrogensulfate,carbonate, hydrogencarbonate, acetate, citrate, phosphate, mono- anddi-hydrogenphosphate, pyrophosphate, polyphosphate, metaphosphate,nitrate, methylsulfate, phosphonate, methylphosphonate,methanedisulfonate, methylsulfonate, ethanesulfonate or an anion of theformulae R⁶SO₃, R⁷SO₄ or R⁶COO, in which R⁶ and R⁷ are C₂-C₂₀-alkyl,preferably C₁₀-C₁₈-alkyl, and R⁷ is additionally alsoC₁-C₁₈-alkylphenyl.

[0018] As compound of the formula (1), particular preference is given toquaternary C₁₂-C₁₄-alkyldimethylhydroxyethylammonium chloride ormethosulfate;

[0019] Suitable anionic surfactants are, in particular,sec-alkanesulfonates, but also alkyl ester sulfonates, alkyl sulfates,carboxylates, phosphates, sulfonates, arylalkylsulfonates, alkyl ethersulfates and mixtures of said compounds. Some of the suitable types ofanionic surfactants will be described in more detail below.

[0020] Secondary Alkanesulfonates

[0021] Secondary alkanesulfonates are surfactants of the formula R—SO₃M,whose alkyl group R is saturated or unsaturated, linear or branched andwhich can also bear hydroxyl groups, where the terminal carbon atoms ofthe alkyl chain do not have a sulfonate group.

[0022] Preference is given to secondary alkanesulfonates with linearalkyl groups having 9 to 25 carbon atoms, preferably having 10 to 20carbon atoms, particularly preferably having 13 to 17 carbon atoms.Counterion M may be sodium, potassium, ammonium, mono-, di- ortrialkanolammonium, calcium, magnesium ion or mixtures thereof.Preference is given to sodium salts of secondary alkanesulfonates.

[0023] Alkyl Ester Sulfonates

[0024] Alkyl ester sulfonates are linear esters of C₈-C₂₀-carboxylicacids (i.e. fatty acids) which are sulfonated by SO₃. Suitable startingmaterials are natural fatty derivatives, such as, for example, tallow orpalm oil fatty acid.

[0025] Alkyl Sulfates

[0026] Alkyl sulfates are water-soluble salts or acids of the formulaROSO₃M, in which R is preferably a C₁₀-C₂₄-hydrocarbon radical,preferably an alkyl or hydroxyalkyl radical having 10 to 20 carbonatoms, particularly preferably a C₁₂-C₁₈-alkyl or hydroxyalkyl radical.M is hydrogen or a cation, e.g. an alkali metal cation (e.g. sodium,potassium, lithium) or ammonium or substituted ammonium, e.g. a methyl,dimethyl and trimethylammonium cation or a quaternary ammonium cation,such as tetramethylammonium and dimethylpiperidinium cation andquaternary ammonium cations derived from alkylamines, such asethylamine, diethylamine, triethylamine and mixtures thereof. Alkylchains with C₁₂-C₁₆ are preferred for low washing temperatures (e.g.below about 50° C.) and alkyl chains with C₁₆-C₁₈ are preferred forhigher washing temperatures (e.g. above about 50° C.).

[0027] Alkyl Ether Sulfates

[0028] The alkyl ether sulfates are water-soluble salts or acids of theformula RO(A)_(m)SO₃M, in which R is an unsubstituted C₁₀-C₂₄-alkyl orhydroxyalkyl radical having 10 to 24 carbon atoms, preferably aC₁₂-C₂₀-alkyl or hydroxyalkyl radical, particularly preferably aC₁₂-C₁₈-alkyl or hydroxyalkyl radical. A is an ethoxy or propoxy unit, mis a number greater than 0, typically between about 0.5 and about 6,particularly preferably between about 0.5 and about 3 and M is ahydrogen atom or a cation, such as, for example, a metal cation (e.g.sodium, potassium, lithium, calcium, magnesium, etc.), ammonium or asubstituted ammonium cation. Examples of substituted ammonium cationsare methyl, dimethyl, trimethylammonium and quaternary ammonium cations,such as tetramethylammonium and dimethylpiperidinium cations, and thosewhich are derived from alkylamines, such as ethylamine, diethylamine,triethylamine, mixtures thereof and the like. Examples which may bementioned are C₁₂-C₁₈-alkyl polyethoxylate(1.0) sulfate, C₁₂-C₁₈-alkylpolyethoxylate(2.25) sulfate, C₁₂-C₁₈-alkyl polyethoxylate(3.0) sulfate,C₁₂-C₁₈-alkyl polyethoxylate(4.0) sulfate, where the cation is sodium orpotassium.

[0029] Other anionic surfactants which are useful for use in washing andcleaning compositions are C₈-C₂₄-olefinsulfonates, sulfonatedpolycarboxylic acids prepared by sulfonation of the pyrrolysis productsof alkaline earth metal citrates, as described, for example, in Britishpatent GB 1,082,179, alkylglycerol sulfates, fatty acylglycerolsulfates, oleylglycerol sulfates, alkylphenol ether sulfates, primaryparaffin sulfonates, alkyl phosphates, alkyl ether phosphates,isethionates, such as acylisethionates, N-acyltaurides, alkylsuccinamates, sulfosuccinates, monoesters of sulfosuccinates(particularly saturated and unsaturated C₁₂-C₁₈-monoesters) and diestersof sulfosuccinates (particularly saturated and unsaturatedC₁₂-C₁₈-diesters), acyl sarcosinates, sulfates of alkylpolysaccharides,such as sulfates of alkylglycosides, branched primary alkyl sulfates andalkyl polyethoxycarboxylates such as those of the formulaRO(CH₂CH₂)_(k)CH₂COO⁻M⁺ in which R is a C₈-C₂₂-alkyl, k is a number from0 to 10 and M is a cation which forms a soluble salt. Resin acids orhydrogenated resin acids, such as rosin or hydrogenated rosin or talloil resins and tall oil resin acids can likewise be used.

[0030] The disperse liquid detergents according to the inventioncomprise one or more builders as further component.

[0031] Suitable organic and inorganic builders are neutral or, inparticular, alkaline salts which can precipitate out calcium ions orform complexes with them. Builders such as orthophosphates and condensedphosphates, e.g. pyrophosphates, triphosphates, tetraphosphates,polyphosphates and metaphosphates, and also finely crystalline,synthetic hydrous zeolites are preferred. The alkali metal phosphateswhich can be present in the form of their alkaline, neutral or acidicsodium or potassium salts are particularly suitable. Examples thereofare trisodium phosphate, tetrasodium diphosphate, disodiumdihydrogenphosphate, pentasodium triphosphate, so-called sodiumhexametaphosphate, oligomeric trisodium phosphate with degrees ofoligomerization of from 5 to 1000, in particular 5 to 50, and mixturesof sodium and potassium salts. As well as phosphates and zeolites,preference is also given to using phyllosilicates and amorphoussilicates, and also carbonates and hydrogen carbonates.

[0032] Organic builders which can be used are, for example, citric acid,nitriloacetate (NTA), and ethylenediaminetetraacetic acid, which arepreferably used in the form of their salts, and phosphonic andpolyphosphonic acids. Analogously to this, it is also possible to usepolymeric carboxylates and salts thereof. These include, for example,the salts of homopolymeric or copolymeric polyacrylates,polymethacrylates and, in particular, copolymers of acrylic acid withmaleic acid, preferably those of 50% to 10% maleic acid, andpolyaspartic acid and also polyvinylpyrrolidone and urethanes. Therelative molecular mass of the homopolymers is generally between 1000and 100 000, that of the copolymers is between 2000 and 200 000,preferably 50 000 to 120 000, based on the free acid, particularlysuitable are also water-soluble polyacrylates which have beencrosslinked, for example, with about 1% of a polyallylether of sucroseand which have a relative molecular mass above one million. Examplesthereof are the polymers obtainable under the name Carbopol 940 and 941.Suitable phosphonates are, for example, acetodiphosphonates,aminotrismethylenephosphonates and ethylenetetramethylenephosphonates.

[0033] “Electrolytes” are understood as meaning non-interfacial-active,water-soluble, ionic compounds which reduce the solubility or themicelle concentration of surfactants in the aqueous formulation andbring about a “salting-out effect”. Alkali metal or ammonium chlorides,nitrates, phosphates, carbonates, sulfates, silicates, acetates,citrates or polyphosphates are suitable. Preference is given to usingpotassium chloride, potassium sulfate, potassium carbonate, pentasodiumtriphosphate and pentapotassium triphosphate.

[0034] In addition to the anionic surfactants, the disperse liquiddetergents according to the invention can also comprise nonionic,amphoteric, but also cationic surfactants.

[0035] Preferred nonionic surfactants are fatty alcohol oxyethylateshaving about 1 to about 25 mol of ethylene oxide. The alkyl chain of thealiphatic alcohols may be linear or branched, primary or secondary, andgenerally contains 8 to 22 carbon atoms. Particular preference is givento the condensation products of alcohols which contain an alkyl chainfrom 10 to 20 carbon atoms with 2 to 18 mol of ethylene oxide per moleof alcohol. The alkyl chain may be saturated or else unsaturated. Thealcohol ethoxylates may equally have a narrow homolog distribution ofthe ethylene oxide (narrow range ethoxylates) or a broad homologdistribution of the ethylene oxide (broad range ethoxylates). Examplesof commercially available nonionic surfactants of this type areTergitol™ 15-S-9 (condensation product of a C₁₁-C₁₅-linear secondaryalcohol with 9 mol of ethylene oxide), Tergitol™ 24-L-NMW (condensationproduct of a C₁₂-C₁₄-linear primary alcohol having 6 mol of ethyleneoxide with a narrow molecular weight distribution). This product classlikewise include the Genapol™ grades from Clariant GmbH.

[0036] Moreover, other known types of nonionic surfactants are alsosuitable according to the invention, such as polyethylene, polypropyleneand polybutylene oxide adducts of fatty alcohols having 8 to 22 carbonatoms in the alkyl chain, and of alkylphenols having 6 to 12 carbonatoms in the alkyl chain, addition products of ethylene oxide with ahydrophobic base formed from the condensation of propylene oxide withpropylene glycol or addition products of ethylene oxide with a reactionproduct of propylene oxide and ethylenediamine, but also fatty acidpolyhydroxamides and fatty acid amidoalkoxylates.

[0037] In addition, it is possible to use semipolar nonionicsurfactants, for example amine oxides of the formula

[0038] in which R⁸ is an alkyl, hydroxyalkyl or alkylphenol group ormixtures thereof with a chain length of from 8 to 22 carbon atoms; R⁹ isan alkylene or hydroxyalkylene group having 2 to 3 carbon atoms or amixtures thereof; R¹⁰ is an alkyl or hydroxyalkyl group having 1 to 3carbon atoms or a polyethylene oxide group having 1 to 3 ethylene oxideunits. The R¹⁰/R⁹ groups can be joined together via an oxygen ornitrogen atom and thus form a ring.

[0039] These amine oxides include, in particular,C₁₀-C₁₈-alkyldimethylamine oxides andC₈-C₁₂-alkoxyethyldihydroxyethylamine oxides.

[0040] Examples of amphoteric surfactants which can be used in theformulations of the present invention are primarily those which aredescribed as derivatives of aliphatic secondary and tertiary amines inwhich the aliphatic radical may be linear or branched and in which oneof the aliphatic substituents contains between 8 and 18 carbon atoms andcontains an anionic, water-soluble group, such as, for example, carboxy,sulfonate, sulfate, phosphate or phosphonate. Amphoteric surfactants inthis connection include amphoteric imidazolinium surfactants, as shownin the formula below:

[0041] in which R¹¹ is C₈-C₂₂-alkyl or alkenyl, preferably C₁₂-C₁₆, R¹²is hydrogen or a group of the formula CH₂CO₂M, R¹³ is a group of theformulae CH₂CH₂OH or CH₂CH₂OCH₂CHCOOM, R¹⁴ is hydrogen or a group of theformulae CH₂CH₂OH or CH₂CH₂OCH₂CHCOOM, Z is CO₂M or CH₂CO₂M, n is 2 or3, preferably 2, M is hydrogen or a cation, such as alkali metal,alkaline earth metal, ammonia or alkanolammonium.

[0042] Preferred amphoteric surfactants of the above formula aremonocarboxylates and dicarboxylates. Examples of these compounds includecocoamphocarboxypropionate, cocoamidocarboxypropionic acid,cocoamphocarboxyglycinate (or also referred to as cocoamphodiacetate)and cocoamphoacetate.

[0043] Further preferred amphoteric surfactants arealkyldimethylbetaines, alkylamidobetaines and alkyldipolyethoxybetaineswith an alkyl radical, which may be linear or branched, having 8 to 22carbon atoms, preferably having 8 to 18 carbon atoms and particularlypreferably having 12 to 18 carbon atoms. These compounds are marketed,for example, by Clariant GmbH under the trade name Genagen®.

[0044] Typical examples of cationic surfactants are quaternary ammoniumcompounds and ester quats, in particular quaternized fatty acidalkanolamine ester salts and dialkylaminopropylamine ester salts.

[0045] Auxiliaries and Additives

[0046] The liquid detergents according to the invention can comprise theauxiliaries and additives customary for these products, for examplebleach activators, bleach catalysts, optical brighteners, grayinginhibitors, color transfer inhibitors, solubility promoters,hydrotropes, enzymes, enzyme stabilizers, thickeners, preservatives,fragrances and dyes, pearlizing agents, foam inhibitors, sequesterants,corrosion inhibitors and antioxidants.

[0047] Representative examples of bleach activators areN,N,N′,N′-tetraacetylethylenediamine (TAED), nonanoylcaprolactamphenylsulfonate ester (APES), glucose pentaacetate (GPA), xylosetetraacetate (TAX), acyloxybenzenesulfonates (e.g.nonanoyloxybenzenesulfonate (NOBS), sodium 4-benzoyloxybenzenesulfonate(SBOBS), sodium trimethylhexanoyloxybenzenesulfonate (STHOBS),diacetyldioxohexahydrotriazine (DADHT), tetraacetylglucoluril (TAGU),tetraacetylcyanic acid (TACA), di-N-acetyldimethylglyoxine (ADMG) and1-phenyl-3-acetylhydantoin (PAH) and nitrilotriacetate (NTA), andammonium nitriles (“nitrile quats”), which are used in combination witha source of hydrogen peroxide. Examples thereof are perboratemonohydrate, perborate tetrahydrate, percarbonates, alkali metalpersulfates, persilicates and percitrates, where sodium is the preferredalkali metal, and hydrogen peroxide adducts onto urea or amine oxides.Additionally or alternatively, peroxycarboxylic acids, for exampledodecanedipercarboxylic acid or phthalimidopercarboxylic acids, whichmay optionally be substituted on the aromatic, may be present. Theaddition of small amounts of known bleach stabilizers, such as, forexample, of phosphonates, borates, or metaborates and metasilicates, andmagnesium salts, such as magnesium sulfate, may be advantageous.

[0048] As optical brighteners, the compositions may comprise derivativesof diaminostilbenedisulfonic acid and alkali metal salts thereof.Suitable compounds are, for example, salts of4,4′-bis(2-anilino-4-morpholino-1,3,5-triazinyl-6-amino)stilbene-2,2′-disulfonicacid or compounds with a similar structure which bear a diethanolaminogroup, a methylamino group, an anilino group or a 2-methoxyethylaminogroup instead of the morpholino group. Likewise suitable are substituteddiphenylstyryls, e.g. alkali metal salts of4,4′-bis(2-sulfostyryl)diphenyl,4,4′-bis(4-chloro-3-sulfostyryl)diphenyl or4-(4-chlorostyryl)-4′-(2-sulfostyryl)diphenyl.

[0049] The maximum content of brighteners in the compositions accordingto the invention is 0.5% by weight, preference being given to usingamounts of from 0.02 to 0.25% by weight.

[0050] Antigraying inhibitors have the task of keeping the released soilsuspended in the liquor. Suitable for this purpose are water-solublecolloids of a mostly organic nature, for example starch and cellulose,and derivatives thereof, glue, gelatin, salts of ether carboxylic acidsor ether sulfonic acids of starch or of cellulose or salts of acidicsulfuric esters of cellulose or of starch. Water-soluble polyamideswhich contain acidic groups are also suitable for this purpose. Inaddition, it is also possible to use starch derivatives other than theabovementioned ones, e.g. aldehyde starches.

[0051] Preference is given to using cellulose ethers, such ascarboxymethylcellulose (Na salt), methylcellulose, hydroxyalkylcelluloseand mixed ethers, such as methylhydroxyethylcellulose, methylhydroxypropylcellulose, methylcarboxymethylcellulose in amounts of from0.3% by weight to 5% by weight, based on the finished composition.

[0052] Suitable color transfer inhibitors are polyvinylpyrrolidones,polyvinylimidazoles, polymeric N-oxides, such as poly(vinylpyridineN-oxide) and copolymers of vinylpyrrolidone with vinylimidazole. Colorprotection additives, such as, for example, quaternary polyaminederivatives, cationic methylolamides or formaldehyde condensationproducts, can also be used.

[0053] As foam inhibitors, the compositions according to the inventioncan comprise fatty acid alkyl ester alkoxylates, organopolysiloxanes andmixtures thereof with microfine, optionally silanized silica, andparaffins, waxes, microcrystalline waxes and mixtures thereof withsilanized silica. Mixtures of different foam inhibitors, e.g. those ofsilicone oil, paraffin oil or waxes, can also be used advantageously.

[0054] The desired viscosity of the compositions can be adjusted byadding water and/or organic solvents or by adding a combination oforganic solvents and thickeners.

[0055] In principle, suitable organic solvents are all mono- orpolyhydric alcohols. Preference is given to using alcohols having 1 to 4carbon atoms, such as methanol, ethanol, propanol, isopropanol,straight-chain and branched butanol, glycerol and mixtures of saidalcohols. Further preferred alcohols are polyethylene glycols with arelative molecular mass below 2000. In particular, a use of polyethyleneglycol with a relative molecular mass between 200 and 600 and in amountsup to 45% by weight and of polyethylene glycol with a relative molecularmass between 400 and 600 in amounts of from 5 to 25% by weight ispreferred. An advantageous mixture of solvents consists of monomericalcohol, for example ethanol and polyethylene glycol in the ratio 0.5:1to 1.2:1, where the liquid detergents according to the invention maycomprise 8 to 12% by weight of such a mixture.

[0056] Further suitable solvents are, for example, triacetin (glyceroltriacetate) and 1-methoxy-2-propanol.

[0057] As thickeners, preference is given to using hydrogenated castoroil, salts of long-chain fatty acids, preferably in amounts of from 0 to5% by weight and in particular in amounts of from 0.5 to 2% by weight,for example sodium, potassium, aluminum, magnesium and titaniumstearates or the sodium and/or potassium salts of behenic acid, and alsopolysaccharides, in particular xanthan gum, guar guar, agar agar,alginates and Tyloses, carboxymethylcellulose and hydroxyethylcellulose,and also relatively high molecular weight polyethylene glycol mono- anddiesters of fatty acids, polyacrylates, polyvinyl alcohol andpolyvinylpyrrolidone.

[0058] Likewise suitable are copolymers based on acryloyldimethyltauricacid, as described in EP 10 60 142, EP 10 28 129, EP 11 16 733 andHostacerin® AMPS.

[0059] Suitable hydrotropes are, for example, sodium toluenesulfonate,sodium cumenesulfonate, sodium xylenesulfonate, alkanephosphonic acidsand alkenyldicarboxylic acids, and anhydrides thereof.

[0060] Suitable enzymes are those from the class of proteases, lipases,amylases and cellulases or mixtures thereof. Their proportion may be 0.2to 3% by weight. The enzymes can be adsorbed to carrier substancesand/or be embedded in coating substances.

[0061] In order to bind traces of heavy metals, the salts ofpolyphosphoric acids, such as 1-hydroxyethane-1,1-diphosphonic acid(HEDP), ethylenediaminetetramethylenephosphonic acid (EDTMP) anddiethylenetriaminepentamethylenephosphonic acid (DTPMP) may be used.

[0062] Suitable preservatives are, for example, phenoxyethanol,formaldehyde solution, parabens, isothiazolinones, pentanediol or sorbicacid.

[0063] Suitable pearlizing agents are, for example, glycol distearicesters, such as ethylene glycol distearate, but also fatty acidmonoglycol esters.

[0064] The liquid detergents according to the invention can be preparedby simply mixing the ingredients, which can be added without a diluentor in the form of a solution to an automatic mixer.

[0065] The examples below are intended to illustrate the invention inmore detail without limiting it thereto. All percentages are percentagesby weight.

EXAMPLES

[0066] 1. Formulations I (*comparative examples) Content [%] Ingredients1* 2* 3 4 5 6 LAS 9 — — — — — Alkyl sulfate 1 1 1 1 — — TEA 0.5 0.5 0.50.5 — — Hostapur SAS — 9 9 9 9 9 Genapol DU 2 2 2 2 2 2 030 STPP 14 1414 — 14 14 PTPP — — — 14 — — Sodium 0.5 0.5 0.5 0.5 0.5 0.5 disilicatePraepagen HY — — 2.0 1.0 0.8 1.4 KCl — — — — 2, 3 — K₂SO₄ — — — — — 2.0Opt. brightener 0.1 0.1 0.1 0.1 0.1 0.1 Enzyme 0.25 0.25 0.25 0.25 0.250.25 (cellulase) Viscosity 2750 — 2200 950 1650 1650 [

] (Brookfield RVT, (spdl 3) — (spdl 3) (spdl 3) (spdl 3) (spdl 3) 20rpm, 22° C.)

[0067] 2. Storage test with formulations I Conditions 1* 2* 3 4 5 6 RT,28 days ok two phases ok ok ok ok 40° C., 28 days two phases two phasesok ok ok ok  5° C., 28 days ok two phases ok ok ok ok

[0068] Washing experiments with formulations I Conditions: LINITESTTemperature: 40° C. Washing time: 30 min Water hardness: 12° Germanhardness Dosing: 10 g/l Reflectance (457 nm, UV filter) [%] Test fabric1* 3 4 5 6 Red wine 51 51 50 51 51 Coffee 57 58 58 59 59 Tea 43 43 43 —— Chlorophyll/plant oil 43 42 42 41 41 Pigment/oil 48 49 48 n.d. n.d.Skin sebum 57 58 58 58 60 Blood/milk/ink 34 34 33 31 32 Cocoa 38 39 39 ——

[0069] 4. Formulations II (*comparative examples) Content [%]Ingredients 1* 7* 8 9 LAS 9 — — — Alkyl sulfate 1 — — — TEA 0.5 — — —Hostapur SAS — 9 9 9 Genapol UD 2 1 1 1 030 STPP 14 12 12 12 PTPP Sodium0.5 0.5 0.5 0.5 disilicate Praepagen HY — — 2.1 1.5 KCl — — — 2.0 K₂SO₄— — — — Opt. brightener 0.1 0.05 0.05 0.05 Enzyme 0.25 0.25 0.25 0.25(Cellulase) Viscosity 2750 — 680 740 [mPa · s] (Brookfield RVT, (spdl 3)— (spdl 2) (spdl 2) 20 rpm, 22° C.)

[0070] 5. Storage test with formulations II Conditions 1* 7* 8 9 RT, 28days ok two phases ok ok 40° C., 28 days two phases two phases ok ok  5°C., 28 days ok two phases ok ok

[0071] 6. Washing experiments with formulations II Conditions: LINITESTTemperature: Washing time: Water hardness: 12° 40° C. 30 min Germanhardness Dosing: 10 g/l Reflectance difference (457 nm, UV filter) [%]Test fabric  1*  7*  8  9 Lipstick 14 12 20 20

[0072] This example shows that the inventive formulations containingsec-alkanesulfonate and quaternary alkylhydroxyethylammonium salt haveclear advantages in the detergency on certain soilings compared with thecomparative examples.

[0073] 7. Preparation of the Formulations in the Laboratory

[0074] In a beaker the optical brightener is firstly made into a pastewith the nonionic surfactant Genapol UD 030 using a glass rod, then ifnecessary alkyl sulfate and TEA are mixed in and then the Hostapur SAS60 is likewise stirred in using a glass rod (mixture 1).

[0075] In a second beaker the required amount of demineralized water isinitially introduced and firstly 9% STPP or PTPP are dissolved withstirring using a magnetic stirrer (mixture 2).

[0076] The clear mixture 2 is then stirred into mixture 1 using a glassrod until particles of the surfactant phase are no longer on the wall ofthe beaker.

[0077] Thereafter, the resulting mixture is further stirred using amagnetic stirrer until a homogeneous dispersion forms. The remainingamount of STPP or PTPP (3% or 5%, respectively) and then the sodiumdisilicate is added.

[0078] After correcting the pH to a value of pH 8.3, the required amountof Praepagen HY and potassium salt is stirred in. Finally, the cellulaseis mixed in and any evaporated demineralized water is replaced.

[0079] Chemical Name of the Commercial Products Used

[0080] LAS linear C₁₂/₁₄-alkylbenzenesulfonate

[0081] Alkyl sulfate C₁₂/₁₄-alkyl sulfate

[0082] TEA Triethanolamine

[0083] Hostapour SAS sac-C₁₃₋₁₇-alkanesulfonate

[0084] Genapol DU 030C₁₁-oxo alcohol polyglycol ether, 3EO

[0085] STPP Sodium tripolyphosphate

[0086] PTPP Potassium tripolyphosphate

[0087] Praepagen HY C₁₂/₁₄-alkyldimethylhydroxyethylammonium chloride

1. An aqueous liquid detergent dispersion which consists essentially of5% by weight to 35% by weight of anionic surfactant 10% by weight to 50%by weight of builders, 0% by weight to 10% by weight of electrolytes and0.1% by weight to 10% by weight of quaternary alkylhydroxyethylammoniumsalt, where the % by weight ratio of anionic surfactant to quaternaryalkylhydroxyethylammonium salt is 50:1 to 2:1.
 2. The aqueous liquiddetergent dispersion as claimed in claim 1, wherein the anionicsurfactant comprises sec-alkanesulfonate.
 3. The aqueous liquiddetergent dispersion as claimed in claim 1, wherein the anionicsurfactant comprises a sodium salt of C₁₃-C₁₇-sec-alkanesulfonate. 4.The aqueous liquid detergent dispersion as claimed in claim 1, whereinthe quaternary alkylhydroxyethylammonium salt is selected from the groupconsisting of C₁₂-C₁₄-alkyldimethylhydroxyethylammonium chloride,C₁₂-C₁₄-alkyldimethylhydroxyethylammonium methosulfate, and mixturesthereof.
 5. The aqueous liquid detergent dispersion as claimed in claim1, which comprises 5 to 25% by weight of anionic surfactant.
 6. Theaqueous liquid detergent dispersion as claimed in claim 1, whichcomprises 5 to 20% by weight of anionic surfactant.
 7. The aqueousliquid detergent dispersion as claimed in claim 1, which comprises 10 to40% by weight of builders.
 8. The aqueous liquid detergent dispersion asclaimed in claim 1, which comprises 10 to 30% by weight of builders. 9.The aqueous liquid detergent dispersion as claimed in claim 1, whichcomprises 0 to 7% by weight of electrolytes.
 10. The aqueous liquiddetergent dispersion as claimed in claim 1, which comprises 0 to 4% byweight of electrolytes.
 11. The aqueous liquid detergent dispersion asclaimed in claim 1, wherein a weight ratio of anionic surfactant toquaternary alkylhydroxyethylammonium salt is 30:1 to 2:1.
 12. Theaqueous liquid detergent dispersion as claimed in claim 1, wherein aweight ratio of anionic surfactant to quaternaryalkylhydroxyethylammonium salt is 15:1 to 2:1.
 13. The aqueous liquiddetergent dispersion as claimed in claim 1, further comprising customaryauxiliaries and additives.